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dc.contributor.authorSadeghianjahromi, Alien_US
dc.contributor.authorKheradmand, Saeiden_US
dc.contributor.authorNemati, Hossainen_US
dc.contributor.authorLiaw, Jane-Sunnen_US
dc.contributor.authorWang, Chi-Chuanen_US
dc.date.accessioned2019-04-02T06:00:32Z-
dc.date.available2019-04-02T06:00:32Z-
dc.date.issued2018-08-01en_US
dc.identifier.issn1996-1073en_US
dc.identifier.urihttp://dx.doi.org/10.3390/en11081959en_US
dc.identifier.urihttp://hdl.handle.net/11536/148260-
dc.description.abstractThis study performs a 3D turbulent flow numerical simulation to improve heat transfer characteristics of wavy fin-and-tube heat exchangers. A compound design encompassing louver, flat, and vortex generator onto wavy fins can significantly enhance the heat transfer performance of wavy fin-and-tube heat exchangers. Replacement of wavy fins around tubes with flat fins is not effective as far as the reduction of thermal resistance is concerned, although an appreciable pressure drop reduction can be achieved. Adding two louvers with a width of 8 mm to the flat portion can reduce thermal resistance up to 6% in comparison with the reference wavy fin. Increasing the louver number and width can further decrease the thermal resistance. Also, it is found that the optimum louver angle is equal to the wavy angle for offering the lowest thermal resistance. Therefore, compound geometry with three louvers, a width of 12 mm, and the louver angle being equal to wavy angle with waffle height to be the same as fin pitch of the reference wavy fin has the most reduction in thermal resistance of 16% for a pumping power of 0.001 W. Adding punching longitudinal vortex generators on this compound geometry can further decrease thermal resistance up to 18%.en_US
dc.language.isoen_USen_US
dc.subjectwavy fin-and-tube heat exchangeren_US
dc.subjectlouver finen_US
dc.subjectvortex generatorsen_US
dc.subjectnumerical simulationen_US
dc.subjectheat transfer enhancementen_US
dc.titleCompound Heat Transfer Enhancement of Wavy Fin-and-Tube Heat Exchangers through Boundary Layer Restarting and Swirled Flowen_US
dc.typeArticleen_US
dc.identifier.doi10.3390/en11081959en_US
dc.identifier.journalENERGIESen_US
dc.citation.volume11en_US
dc.contributor.department機械工程學系zh_TW
dc.contributor.departmentDepartment of Mechanical Engineeringen_US
dc.identifier.wosnumberWOS:000446604100038en_US
dc.citation.woscount2en_US
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